KR960039979A - Digital Audio Encoder with Speech Multiple System - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a digital audio encoder in which a speech multiplexing system for satisfying audio digital signal processing and speech multiplexing by adding audio multiplex to a digital audio coder applied to a high definition television. Channel digital audio systems are capable of making digital audio encoders that extend to multiple channels, but multichannel audio encoders have the disadvantage that the system is complex and expensive, and that two-channel digital audio systems only support stereo. In the present invention, the encoder system is designed to extend a simple two-channel digital audio system to support voice multiples in demand in actual broadcasting systems, so that the voice data used in the voice multiples can be transformed and encoded such as two-channel digital audio data. To be coded in the system is avoided from becoming complex for the audio data requires a relatively large amount of data transfer rate without the system is less complicated by the size of the block to be processed out twice it costs also is possible to configure the sound multiplex system.

Description

Digital Audio Encoder with Speech Multiple System

As this is a public information case, the full text was not included.

1 is an overall configuration diagram of a digital audio encoder of the present invention.

Claims (5)

A system for adding and processing a speech multiplex to a digital audio encoder applied to a high definition television, comprising: a first sampling unit (10) for inputting and sampling two stereo audio data (L, R); A second sampling unit 20 for inputting and sampling two voice multiple data S1 and S2; Input the signals L ', R' (S1 ', S2') output from the sampling units 10 and 20, respectively, and determine the window size and the MD / MDST according to the presence or absence of voice data. A main coder 30 and a seed coder 40 for determining the size of? And a formatting unit (50) for generating a bitstream by simultaneously formatting the data output from the main coder (30) and the slave coder (40). 2. The first sampling unit 10 of claim 1, wherein the sampling frequency of the second sampling unit 20 is smaller than the stereo audio data L, R of the input voice data S1 and S2. Digital audio coder with speech multiplexing system characterized in that it is set to half of sampling frequency. According to claim 1, wherein the main coder 30 and the seed coder 40 is the data (L ', R') (S1 ') sampled by the first sampling unit 10 and the second sampling unit 20, respectively. A scaling unit 31 for inputting S2 ') to adjust the signal range; A window overlap section (32) covering an overlap-ed window for overlapping and processing adjacent blocks to remove noise between blocks of data scaled by the scaling section (31); In order to determine the window size of the overlap overlap unit 32, the presence or absence of voice data is determined by the output data of the scaling unit 31 and the block size selection unit 33 determines the size of the block. ; The data passing through the window overlap section 32 includes an MD / ST unit 34 for extracting respective coefficients by performing an MD / MS that has a size equal to that of a window; A subband block processing unit 35 for normalizing the MD / MT coefficients extracted from the MD / MT unit 34 to display each as an mantissa consisting of an exponent unit and a fixed bit term and a floating bit term; A floating bit allocating unit (36) for allocating floating bit terms in the mantissa unit indicated by the subband block processing unit (35); An adaptive quantizer for quantizing the fixed bit data of the exponent part and the mantissa part output from the subband block processing part 35 and the floating bit data output from the floating bit allocation part 36 and outputting the quantized part to the formatting part 50. And a digital audio encoder to which the voice multiplexing system is configured. 4. The method of claim 3, wherein if the voice data presence determining unit and the block size selecting unit 33 determine that there is input of voice multiple data, the size of the widow and the size of the MD / MSD are determined to be 1024. Digital audio encoder using a speech multiplexing system. The data format of the data format of the bitstream formatted and output by the formatting unit 50 is the first frame in which flag data indicating the presence or absence of synchronous data and audio multiple data is present. (a), the second and third frames (b) and (c) each having the exponent portion data and the fixed bit data of the main coder 30, respectively, and the exponent portion data and the fixed bit data of the vertical coder 40, respectively. The fourth and fifth frames (d) (e), the sixth frame (f) in which the flow bit data of the main coder 30 exists, and the seventh frame in which the flow bit data of the slave coder 40 exists ( g) a digital audio encoder employing a speech multiplexing system, characterized in that order. ※ Note: The disclosure is based on the initial application.